SkullSatamon is an Undead Digimon whose name and design are derived from "Skull" and the mythological Satan. Pursuing strength and destruction, it fell to the Dark Area as a Fallen Angel Digimon with its appearance a ruin of what it once was. However, its wickedness was refined even more, so that its dark powers are unfathomable. Its DigiCore, concentrated with mighty powers of darkness, is the characteristic of Demon-species Digimon called the "Dark Core".

SkullSatamon got its second Digivolution line, Tsukaimon, in kDMO on February 19th, 2014.